CN207848293U - A kind of Vehicle Suspension System MR damper - Google Patents

Abstract

The utility model discloses a magnetorheological damper for a vehicle suspension vibration reduction system, which is mainly composed of a rear end cover, a floating piston, first and second piston heads, a piston rod, an excitation coil, a cylinder body, a front end cover and the like. . When the car body vibrates, the piston rod drives the first piston head and the second piston head to move correspondingly, so that the volumes of the closed chamber II and the closed chamber IV change accordingly, and the volume of the closed chamber III remains unchanged. When the excitation coil is loaded with current, the pressure of the closed volume III increases; since the closed volume II is a high-pressure oil chamber, and the closed volume IV is a low-pressure oil chamber, this is more conducive to the axial translation of the two piston heads to offset Vibration caused by the road surface, so as to achieve real-time vibration reduction effect. The utility model is installed in the vehicle suspension damping system, which can adjust the damping automatically according to the driving conditions of the vehicle, so that the damping system can control the damping force in real time according to the road conditions, and achieve the purpose of improving the riding comfort and handling stability of the vehicle.

Description

Magneto-rheological damper for vehicle suspension damping system

technical field

The utility model relates to a magneto-rheological damper, in particular to a magnetorheological damper for a vehicle suspension vibration reduction system.

Background technique

With the rapid development of industrial technology and the improvement of people's material living standards, the driving stability of vehicles has attracted more and more attention. When the vehicle is running, the vehicle will vibrate due to the contact between the wheels and the ground. When the vehicle is running on bad road conditions, the vibration will be more intense, which will not only affect the health of the drivers and passengers, but even threaten the lives of the drivers and passengers.

With the development of magnetorheological technology, more and more attention has been paid to the application of magnetorheological dampers in vehicle suspension, and more and more research results have been obtained. However, at present, the dampers used in the suspension systems of some medium and low-end vehicles in China are basically ordinary dampers, which cannot be well adapted to various road conditions and vehicle usage conditions in real time. Only the magneto-rheological damper installed on the suspension damping system of some high-end vehicles has a short response time, can achieve real-time dynamic adjustment, and can provide almost continuously changing and longer-range damping adjustment, but its device structure is complicated. The cost is higher.

Based on this, it is necessary to design a magneto-rheological damper for vehicle suspension vibration reduction system with simple and compact structure, low cost and real-time damping control, so as to reduce the vibration of the vehicle under harsh road conditions and ensure the ride comfort of the drivers and passengers. Comfort and safety.

Contents of the invention

In order to overcome the problems existing in the magneto-rheological damper for the vehicle suspension vibration reduction system described in the background technology, the utility model provides a magneto-rheological damper for the vehicle suspension vibration reduction system. The magneto-rheological damper is installed in the vehicle suspension damping system, which can automatically adjust the damping according to the driving conditions of the vehicle, so that the vehicle suspension system can control the damping in real time according to the road conditions, thereby reducing the vibration transmitted from the ground to the vehicle suspension. When the road condition of the vehicle changes, the vehicle body vibrates, which will drive the piston rod to move back and forth in the cylinder body. At the same time, the piston rod drives the first piston head and the second piston head to move accordingly, so that the closed cavity II And the volume of the closed cavity IV changes accordingly; at this time, the sensor for detecting the vibration of the vehicle body will send out a signal, and the signal will be transmitted to the central processing unit through the power supply, and after being processed by the control algorithm stored in the central processing unit itself, the central processing unit will A control signal is sent to the excitation coil to control the intensity of the magnetic field generated by the excitation coil. By changing the magnetic field strength to change the damping coefficient of the magnetorheological fluid, it can control the damping force of the damper to offset the vibration force caused by the road surface or other aspects.

The technical solution adopted by the utility model to solve the technical problem includes: rear end cover (1), floating piston (2), nut (3), second piston head (4), piston rod (5), excitation coil (6 ), cylinder block (7), front end cover (8), right lifting lug (9), damping hole (10), first piston head (11), shaft sleeve (12) and left lifting lug (13); rear end The cover (1) is fixedly connected with the cylinder body (7) by screws; the left end of the rear end cover (1) is externally processed with external threads, and the hollow part at the right end of the left lifting lug (13) is processed with internal thread holes; the rear end cover (1) and The left lug (13) is fixedly connected by thread; the outer surface of the floating piston (2) is in clearance fit with the inner surface of the cylinder (7), and the two are sealed by a sealing ring; the front end cover (8) is connected to the cylinder ( 7) Fixed connection; a circular through hole is processed in the middle of the front end cover (8), and the right end of the piston rod (5) fits with the circular through hole of the front end cover (8), and is sealed by a sealing ring; the right end of the piston rod (5) The external surface of the head is processed with external threads, and the hollow part of the left end of the right lifting lug (9) is processed with internal thread holes, and the piston rod (5) is fixedly connected with the right lifting lug (9) through threads; the outer surface of the second piston head (4) is Cooperate with the inner surface of the cylinder (7) and seal it through the sealing ring; the right end surface of the second piston head (4) is close to the left end surface of the shaft sleeve (12); the right end surface of the shaft sleeve (12) is close to the first piston head (11) left end face; the right end face of the first piston head (11) is axially positioned through the shoulder of the middle part of the piston rod (5); the second piston head (4), the bushing (12) and the first piston head (11) ) centers are respectively processed with circular through holes, and the circular through holes are transitionally matched with the piston rod (5); the outer surface of the left end of the piston rod (5) is processed with external threads, and the nut (3) and the piston rod (5) pass through The threaded fixed connection is used for axially fixing the second piston head (4), the shaft sleeve (12) and the first piston head (11); the outer surface of the first piston head (11) is processed with an annular groove for excitation The coil (6) is wound in the annular groove; the two lead wires of the excitation coil (6) are drawn out through the lead wire groove of the first piston head (11) and the lead wire hole of the cylinder body (7); the rear end cover (1) , the cylinder body (7) and the floating piston (2) form a closed chamber I; the second piston head (4), the floating piston (2) and the cylinder body (7) form a closed chamber II; A closed chamber III is formed between the two piston heads (4), the cylinder body (7) and the first piston head (11); between the front end cover (8), the cylinder body (7) and the first piston head (11) Closed volume IV is enclosed; closed volume II, closed volume III and closed volume IV are filled with magnetorheological fluid, and closed volume I is filled with compressed gas; closed volume III and closed volume IV pass through the first The three circular through holes evenly distributed on the piston head (11) are connected; the middle part of the piston rod (5) is processed with a damping hole (10) in the axial direction, and the damping hole (10) is used to communicate with the closed chamber II and the closed chamber. cavity IV; when the piston rod (5) moves in the axial direction, the volumes of the closed cavity II and the closed cavity IV will change accordingly, and the floating piston (2 ) will achieve volume compensation by floating left and right in the axial direction.

Compared with the background technology, the utility model has the beneficial effects of:

(1) The utility model adopts the first piston head and the second piston head to more accurately determine the volume of the closed volume II and the closed volume IV; in addition, the volume of the closed volume III remains unchanged, and when the excitation coil is loaded with current, The damping force of closed volume III and closed volume IV will increase, and the pressure of closed volume III will increase at this time; since closed volume II is a high-pressure oil chamber, closed volume IV is a low-pressure oil chamber, which is more conducive to The two piston heads move axially to the right to offset the vibration caused by the road surface or other aspects, so as to achieve the real-time vibration reduction effect of the damper.

(2) The utility model is applied in the vehicle suspension damping system, which can automatically adjust the damping according to the driving conditions of the vehicle, so that the vehicle suspension damping system can control the damping in real time according to the road conditions, so as to reduce the vibration of the vehicle when the road conditions are bad. Vibration, to ensure the comfort and safety of drivers and passengers.

(3) The utility model not only has a simple control principle of the vibration damping system, but also has the advantages of compact structure and easy manufacture. The performance of the magneto-rheological damper used in the vehicle suspension vibration reduction system is greatly improved, and the ride comfort and handling stability of the vehicle can be well improved.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Shown in Fig. 1 is the structural representation of the utility model, and the utility model comprises rear end cap (1), floating piston (2), nut (3), the second piston head (4), piston rod (5), excitation coil ( 6), cylinder block (7), front end cover (8), right lug (9), damping hole (10), first piston head (11), shaft sleeve (12) and left lug (13). The right end of piston rod (5) is provided with the right lug (9) that is connected with vehicle suspension, and both are fixedly connected by thread. The left end portion of the rear end cover (1) is provided with a left lug (13) for being connected with the vehicle body, and the two are fixedly connected by threads.

The working principle of the utility model is as follows:

When the road condition of the vehicle changes, the vehicle body vibrates, which will drive the piston rod to move back and forth in the cylinder body. At the same time, the piston rod drives the first piston head and the second piston head to move accordingly, so that the closed cavity II And the volume of the closed cavity IV changes accordingly; at this time, the sensor that detects the vibration of the vehicle body will send out a signal, and the signal will be transmitted to the central processing unit through the power supply, and after being processed by the control algorithm stored in the central processing unit itself, the central processing unit will A control signal is sent to the excitation coil to control the intensity of the magnetic field generated by the excitation coil. Change the damping coefficient of the magnetorheological fluid by changing the strength of the magnetic field to control the damping force of the damper to offset the vibration force caused by the road surface or other aspects, thereby reducing the vibration transmitted to the body from the road condition and improving the driving comfort of the vehicle and handling stability purposes.

Claims (1)

1. a kind of Vehicle Suspension System MR damper, it is characterised in that：Including rear end cap (1), floating piston (2), nut (3), second piston head (4), piston rod (5), magnet exciting coil (6), cylinder body (7), drive end bearing bracket (8), right lifting lug (9), Damping hole (10), first piston head (11), axle sleeve (12) and left lifting lug (13)；Rear end cap (1) is fixed by screw and cylinder body (7) Connection；Rear end cap (1) left end external process has external screw thread, left lifting lug (13) right end hollow part to be machined with internal thread hole；Rear end Lid (1) is threadably secured with left lifting lug (13) to be connect；Between floating piston (2) circumferential outer surface and cylinder body (7) circumferential inner surface Gap coordinates, and the two is sealed by a seal ring；Drive end bearing bracket (8) is fixedly connected by screw with cylinder body (7)；In drive end bearing bracket (8) Between be machined with circular through hole, piston rod (5) right end and drive end bearing bracket (8) circular through hole clearance fit, and carried out by sealing ring close Envelope；Piston rod (5) right part outer surface is machined with external screw thread, and right lifting lug (9) left end hollow part is machined with internal thread hole, piston Bar (5) is threadably secured with right lifting lug (9) and connect；Second piston head (4) circumferential outer surface is matched with cylinder body (7) internal surface gaps It closes, and is sealed by a seal ring；Second piston head (4) right side abuts axle sleeve (12) left side；Axle sleeve (12) right side Against first piston head (11) left side；First piston head (11) right side is axial by the shoulder at the intermediate position of piston rod (5) Positioning；Second piston head (4), axle sleeve (12) and first piston head (11) center are machined with circular through hole, circular through hole respectively Coordinate with piston rod (5) transition；Piston rod (5) left part outer surface is machined with external screw thread, and nut (3) is logical with piston rod (5) The connection that is screwed is crossed, axial restraint second piston head (4), axle sleeve (12) and first piston head (11) are used for；First piston head (11) circumferential outer surface is machined with toroidal cavity, and magnet exciting coil (6) is wrapped in toroidal cavity；The two of magnet exciting coil (6) Root lead is drawn by the wire lead slot of first piston head (11) and the fairlead of cylinder body (7)；Rear end cap (1), cylinder body (7) and floating Closing vessel I is surrounded between piston (2)；Closing vessel is surrounded between second piston head (4), floating piston (2) and cylinder body (7) Ⅱ；Closing vessel III is surrounded between second piston head (4), cylinder body (7) and first piston head (11)；Drive end bearing bracket (8), cylinder body (7) And closing vessel IV is surrounded between first piston head (11)；It is filled in closing vessel II, closing vessel III and closing vessel IV Magnetorheological fluid, closing vessel I is interior to fill compressed gas；It closes vessel III and closes vessel IV and pass through on first piston head (11) 3 circular through holes of even distribution are connected；It is machined with damping hole (10), damping hole on the intermediate position axis direction of piston rod (5) (10) it is used for being connected to closing vessel II and closing vessel IV；When piston rod (5) in axial direction moves, vessel II and envelope are closed Respective change can be occurred by closing the volume of vessel IV, and floating piston (2) can be floated by the left and right of axial direction to realize body at this time Product compensation.